Catenary arch building toy



FIG. 1 is a front elevational view of a catenary arch building toy showing my new design, the side opposite being substantially mirror image;

FIG. 2 is a right side elevational view thereof, the side opposite being a mirror image;

FIG. 3 is a top plan view thereof; and

FIG. 4 is a bottom plan view thereof. 

The ornamental design for caternary arch building toy, as shown and described. 